Pipe-coupling.



PATENTED APR. 10, 1906.

0. E. DAVID. PIPE COUPLING. APPLICATION FILED APR. 26. 1905.

ITE

STATES PATENT OFFICE.

ORLANDO'E. DAVID, or B ADFORD, PENNSYLVANIA;

iss-comma.

Specification of Letters Patent. Application filed April 26,1905. 'ElerialNo. 257,559.

Patented April 10, 1906.

lings, of which the following is a specifica-- tion.

My invention relates to Experience has shown that in large pipelines coupled together without threads there is a great tendency to creep, and as a result many leaks are started in the lines. Thread- 1 ed couplings are impractical for lines of this sort inasmuch as after they have been buried under the ground for any length of time the threads become so rusted that it is exceedingly diflicult to separate the pipes when it is necessary to re lace them.

The object o my invention is to produce a pipe-coupling which will prevent the pipes creeping in the couplings and one which may a be easily disconnected.

With these objects in view my invention conslsts 1n the construction hereinafter described, and more particularly pointed out in i the claims.

Referring to the accompanying drawings, Figure 1 is a longitudinal section of the coupling ap lied to the pipes. Fi 2 is an end view; ig. 3 is a longitudina section of a modifiedform of the coupling.

In the drawings, A A indicate the adjacent ends of two ipes. Surrounding the abutting ends oft ese pipes is a thimble B, which overlaps the end of each pipe and fits snugly aroun the same. Secured near the end of each dpipe is a collar or sleeve 0, which is provide with an internal annular recess '0 of sufiicient depth, to receive the thimble B. In the rearen of eachsleeve is a .series'of fecesses L, in each of which is loosely mounted a jaw M,- having a toothed or serrated face m, which en ages the surface of the pipe A and is pressed mly against the same by the setscrew N, which extends through the sleeve O and engages the back of the j awM.

Modified forms of the thirnble B and sleeve 0 are shown in Fi 3. In this form of the device the thimble B has its internal surface slightly concaved and is provided with'a centrally-arranged and inwardly-extending projection 0', against which the ends of the ipe strike to insure the placin of the cou g centrally over the joint. he recesses 4 in the sleeve C are formed with their upper surfaces beveled, so that the depth of t e recess pipe couplings.

'each havin in its rear is reduced at the outer end thereof. The jaws M are also formed with a beveled upper surface toi fit in the recess L. The teeth m ofthe jaw are pressed firmly into engagement with the pipe, and any creepin of the same in the sleeve will carry the beve ed face of .the jaw against the oppositely-beveled face of the recess and serve to press the jaw more firmly against the pipe, effectually sto ping the creeping. That portion of t e sleeve C which lies between the recess L and j the recess 0 is flared outwardly at (1*, so that it comes in contact with the pipe only at 0.

Thus it will be seen that the-sleeve 0, taken in connection with the adjacent half of the concaved thimble B, forms practically a tubular sleeve having its opposite ends flared to permit the pipe to a ust itself to any irregularities in the surface of the ground.

A packing-ring D of any suitable material is placed between the end of the thimble B, the

walls of the recess 0, and the pipe,which give good packing-surfaces on four sides, against which the packing-ring is compressed.

Secured to or formed integral with the sleeve C at intervals around its outer circumference is a series of lugs or projections O,

ace one or more recesses 0, a apted to receive the ends of the connecting-link H. This link is preferably formed of a'sin 1e rod bent into substantially a U shape and having its free ends connected by the plate h, which carries the set-screw h for adjusting the length of the link to brin the proper pressure to bear on the lugs when the lever E is depressed. On the 0 posits end of the link is secured a lever aving a cam-shaped bearing-face :3, adapted to engage the face of, the lug O.- i

he manner of connectin the pipes will be readily understood from t e foregoing description, and it will be seenthat the coupling is onein which: there can be no creeping of the ipes, because of the toothed jaws M, which ite into the pipe and hold. the sleeve 0 against any movement whatever. The link H is made adjustable in order to. take up any slack in the cou ling, and the operating- 7 lever E is not liab e to be so corroded'or prevent it from being easily op-.'

cloggedas to erated.

Having described my invention, what I claim is 1. In a pipe coupling, the combination with the pipes, the sleevessecured' thereto and lugs carried by said sleeves, of a link a set-screw carried thereby and adapted to engage one of said lugs and a cam-shaped lever carried by said link and engaging the other of said lugs, substantially as described.

2. In a pipe-coupling, the combination with the pipes, the sleeves secured thereto and lugs carried by said sleeves, of a link engaging one of said lugs, a cam-shaped lever carried by said link and engaging the other.

lug and means for adjusting the length of said link, substantially as described.

3. A pipe-coupling comprising the sleeves, the jaws carried thereby, the lugs, on said sleeves, the thimble surrounding the ends of the pipes and in contact therewith, the link engaging said lugs and the cam-shaped lever carried by said link, substantially as described.

4. In a pipe-coupling, the combination with the pipes and the lugs carried by the abutting ends thereof, of a link adapted to engage said lugs, said linkcomprising a de tachable U-shaped bar, locking means carried thereby and means distinct from said locking means for adjusting the length of the link, substantially as described.

5. In a pipe-coupling the combination with the pipes and the lugs carried by the abutting ends thereof, of a link adapted to engage said lugs, said link comprising a detachable U-shaped bar, a plate across the open end thereof, a set-screw carried by said plate for adjusting the length of said link and a cam-lever carried by said U-shaped bar, substantially as described.

6.In a pipe-coupling, the combination with the pipes, of the sleeves mounted thereon, said sleeves having tapered recesses therein, jaws carried in said recesses, and means for connecting said sleeves, substantially as described.

7 In a pipe-coupling, the combination with the pipes, of the sleeves mounted thereon, said sleeves having recesses therein of less depth at the outer end than at the inner end thereof, jaws carried in said recesses, said jaws having a beveled upper surface, and means for connecting said sleeves, substantially as described.

8. In a pipe-coupling, the combination of the pipes, the sleeves mounted thereon and having recesses in the opposite ends thereof, an outwardly-flaring portion between said recesses, and means for connecting said sleeves, substantially as described.

9. Ina pipe-coupling, the combination with the pipes, the sleeves mounted thereon and having recesses in the opposite ends thereof, an inwardlytapered portion be tween said recesses, of a -thimble surrounding the ends of said pipes and entering the recesses in the inner ends of said sleeves, said thimble being tapered from the center toward the ends thereof, and means for connecting said sleeves, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ORLANDO E. DAVID.

Witnesses:

EDWIN E. TAIT, KATHARINE T. BURKE. 

